Superstructured NiMoO4@CoMoO4 core-shell nanofibers for supercapacitors with ultrahigh areal capacitance

被引：14

作者：

Chang, Liang ^{[1
]}

Chen, Shaoqin ^{[1
]}

Fei, Yuhuan ^{[1
]}

Stacchiola, Dario J. ^{[2
]}

Hu, Yun Hang ^{[1
]}

机构：

[1] Michigan Technol Univ, Dept Mat Sci & Engn, Houghton, MI 49931 USA

[2] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2023年 / 120卷 / 12期

关键词：

superstructure; supercapacitor; NiMoO4@CoMoO4; core-shell structure; areal capacitance; PERFORMANCE; NANOSHEET; ELECTRODE; GRAPHENE; NIMOO4/COMOO4; CONSTRUCTION; NICKEL; ARRAYS; CARBON; FOAM;

D O I：

10.1073/pnas.2219950120

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

High areal capacitance for a practical supercapacitor electrode requires both large mass loading and high utilization efficiency of electroactive materials, which presents a great challenge. Herein, we demonstrated the unprecedented synthesis of superstruc-tured NiMoO4@CoMoO4 core-shell nanofiber arrays (NFAs) on a Mo-transition-layer-modified nickel foam (NF) current collector as a new material, achieving the synergistic combination of highly conductive CoMoO4 and electrochemical active NiMoO4. Moreover, this superstructured material exhibited a large gravimetric capac-itance of 1,282.2 F/g in 2 M KOH with a mass loading of 7.8 mg/cm2, leading to an ultrahigh areal capacitance of 10.0 F/cm2 that is larger than any reported values of CoMoO4 and NiMoO4 electrodes. This work provides a strategic insight for rational design of electrodes with high areal capacitances for supercapacitors.

引用

页数：8